Google Nexus 5 - Exchange Email Notifications

[rws381]

Hey all, I've really been enjoying my N5 over the last few weeks but am wondering about exchange email notifications. I only receive an audible notification, or vibrate if in vibrate mode, for new mail on the first mail in the notification shade. I'll only get the tone for the first of three emails if three come in before I open the mail app or clear the notification. Kind of confusing the say but hope this makes sense.

Is this what everyone else is experiencing as well? I've looked through the settings but haven't seen a way to change this behavior. I would rather have an audible notification for each new email if possible.